diff --git a/README.md b/README.md
index 1f26bb8..a03d46d 100644
--- a/README.md
+++ b/README.md
@@ -67,6 +67,16 @@ python opencv_webcam.py
 
 
 
+### :bulb: 摄像头选择
+
+```shell
+# 多摄像头切换示例
+python opencv_webcam.py -dev 1
+python opencv_webcam.py -dev 2
+```
+
+
+
 #### :bulb: 设置退出键
 
 ```shell